Basic PHP entry failing - php

Question

I'm setting up a wedding invitation RSVP form. I have here what should be a basic PHP and SQL data entry, but I keep getting the error:
"Could not enter data: No database selected"
UPDATE - Many thanks to all your suggestions. I have updated my code as you can see bellow. I now get a new error as follows:
"Could not connect:" (witch is a message I output myself in line 7, but it does not show the error that should follow")
Does anyone know what this means please?
Here is my [UPDATED] code:
<?php
function submit(){
$con = mysqli_connect("localhost", "jaredand_rsvp", "jar3dandcr1st1na", "jaredand_rsvp");
if (!$con)
{
die('Could not connect: ' . $con->error);
}
$name = $_POST['name'];
$partnerName = $_POST['partner_name'];
$allergies = $_POST['allergies'];
$comments = $_POST['comment'];
$going = $_POST['going'];
$sql = 'INSERT INTO rsvp '.
'(name,partner_name, allergies, comments, going) '.
'VALUES ( "'.$name.'", "'.$partnerName.'", "'.$allergies.'", "'.$comments.'", "'.$going.'")';
$result = $con->query($sql);
if(!$result )
{
die('Could not enter data: ' . $result->error);
}
echo "Entered data successfully\n";
mysqli_close($con);
}
if(isset($_POST['name']))
{
submit();
}
?>
Can anyone please advise me on what I am doing incorrectly?

Answer 1

That happens because mysql_connect doesn't have database name as parameter.
You should connect to the server, and then select a database by calling mysql_select_db
Cheers!

Answer 2

this is the right way
$con = mysql_connect("localhost","USERNAME","PASSWORD);
mysql_select_db('jaredand_rsvp', $con);
but please use "mysqli"
$con = mysqli_connect("localhost", "USERNAME", "PASSWORD, "jaredand_rsvp");
$result = $con->query($sql);
happy to help,
for security is better if you escape your values before insert :
$name = $con->real_escape_string($_POST['name']);
$partnerName = $con->real_escape_string($_POST['partner_name']);
$allergies = $con->real_escape_string($_POST['allergies']);
$comments = $con->real_escape_string($_POST['comment']);
$going = $con->real_escape_string($_POST['going']);

Answer 3

Try to connect to the database first and then select the database name
I hope this will fix your issue
Or you could use PDO because mysql_connect is depricated

Answer 4

You have used $con = mysql_connect(); at the top and bottom you are using:
mysqli_close();
First follow the same standarad. Use mysqli instead of sqli at top.i.e,
$con = mysqli_connect("localhost","USERNAME","PASSWORD", "jaredand_rsvp");
Remove the line: mysql_select_db('jaredand_rsvp');
and replace $retval = mysql_query( $sql, $con ); with
$retval = mysqli_query( $sql, $con );

Answer 5

Use it another Way
<?php
function submit() {
$host = "localhost";
$username = "root";
$password = "";
$dbname = "jaredand_rsvp";
$con = new mysqli($host, $username, $password, $dbname);
if ($conn -> connect_error) {
die("Connection failed: " . $conn -> connect_error);
}
$name = $_POST['name'];
$partnerName = $_POST['partner_name'];
$allergies = $_POST['allergies'];
$comments = $_POST['comment'];
$going = $_POST['going'];
$sql = 'INSERT INTO rsvp ' . '(name,partner_name, allergies, comments, going) ' . 'VALUES ( "' . $name . '", "' . $partnerName . '", "' . $allergies . '", "' . $comments . '", "' . $going . '")';
if($con->query($sql)== TRUE){
echo "Data Inserted";
}
else {
echo mysqli_error($con);
}
mysqli_close($con);
}
if (isset($_POST['name'])) {
submit();
}
?>

Answer 6

How about using MySQLi instead of the now depreciated MySQL?
EDIT
Okay, I see no connection being made to the database. Something like
<?php
$servername = "localhost";
$username = "username";
$password = "password";
// Create connection
$conn = new mysqli($servername, $username, $password);
// Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
echo "Connected successfully";
?>
If you have stored the db connect credential on a different file then i see no include or require mentioned on your this script either. Check if you have made the connection and then get back.